Imaging the dust sublimation front of a circumbinary disk

Abstract

We present the first near-IR milli-arcsecond-scale image of a post-AGB binary that is surrounded by hot circumbinary dust. A very rich interferometric data set in six spectral channels was acquired of IRAS08544-4431 with the new RAPID camera on the PIONIER beam combiner at the Very Large Telescope Interferometer (VLTI). A broadband image in the \textit{H} band was reconstructed by combining the data of all spectral channels using the SPARCO method. We spatially separate all the building blocks of the IRAS08544-4431 system in our milliarcsecond-resolution image. Our dissection reveals a dust sublimation front that is strikingly similar to that expected in early-stage protoplanetary disks, as well as an unexpected flux signal of $\sim$4\% from the secondary star. The energy output from this companion indicates the presence of a compact circum-companion accretion disk, which is likely the origin of the fast outflow detected in H$\alpha$. Our image provides the most detailed view into the heart of a dusty circumstellar disk to date. Our results demonstrate that binary evolution processes and circumstellar disk evolution can be studied in detail in space and over time.

arXiv commentPR @ http://www.eso.org/public/news/eso1608/

References in corpus (18)

• emcee: The MCMC Hammer
• PIONIER: a 4-telescope visitor instrument at VLTI
• Keplerian discs around post-AGB stars: a common phenomenon?
• Post-AGB stars with hot circumstellar dust: binarity of the low-amplitude pulsators
• The Inner Rim Structures of Protoplanetary Discs
• Extended rotating disks around post-AGB stars
• Optically Visible Post-AGB Stars, Post-RGB Stars and Young Stellar Objects in the Large Magellanic Cloud
• Silicate features in Galactic and extragalactic post-AGB discs
• ALMA observations of the Red Rectangle, a preliminary analysis
• Image reconstruction in optical interferometry: Benchmarking the regularization
• Detection of Keplerian dynamics in a disk around the post-AGB star AC Her
• Time resolved spectroscopy of BD+46 442: gas streams and jet creation in a newly discovered evolved binary with a disk
• IRAS 08544-4431 : a new post-AGB star in a binary system surrounded by a dusty disc
• The evolved circumbinary disk of AC Her: a radiative transfer, interferometric and mineralogical study
• SPARCO : a semi-parametric approach for image reconstruction of chromatic objects
• A low optical depth region in the inner disk of the HerbigAe star HR5999
• Imaging reconstruction for infrared interferometry: first images of YSOs environment
• Intricate visibility effects from resolved emission of young stellar objects: the case of MWC158 observed with the VLTI

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